Netra Modular System
 

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In this Document

Goal

Solution

Oracle Confidential PARTNER - Available to partners (SUN).
Reason: CAP document

Applies to:

Goal

How to Replace an NMS (Netra Modular System) PDU

Solution

CAP PROBLEM OVERVIEW:

DISPATCH INSTRUCTIONS

WHAT SKILLS DOES THE ENGINEER NEED:
Netra Modular System Training

TIME ESTIMATE: 120 minutes x two FEs

TASK COMPLEXITY: 4

FIELD ENGINEER INSTRUCTIONS

It is recommended before arriving on site to review the process in the service manual supplement as it contains graphic and additional information that is too large or too complex to fix into this text only CAP.
Reference:
  Servicing PDUs
  http://docs.oracle.com/cd/E59318_01/html/E59323/z400000e165586.html#scrolltoc

Tools Needed:
T-25 Torx wrench key (included in the modular system shipping kit)
T-30 Torx wrench key (included in the modular system shipping kit)
M5 shipping screws and washers (included in the PDU shipping kit)
M12 torque wrench and M12 concrete bolts, such as Hilte M12 HSL-3-B anchors, if you need to move a modular system that is anchored to the floor.
#3 Phillips screwdriver - recommended magnetic with 6" minimum shaft.  A 12-16" works best on this system.
Cordless drill and matching T-25 and T-30 drill bits

Also, you must supply:
Antistatic wrist strap
Tie wraps
Clean anti-static work table, or area, near the modular system

WHAT STATE SHOULD THE SYSTEM BE IN TO BE READY TO PERFORM THE RESOLUTION ACTIVITY? :

Caution – Because of their size and weight, you will need another person to help lift and install the PDU into the modular system. You might need additional help when routing the PDU power input cords.

Attach a wrist strap to your wrist and to the ESD grounding jack on the rear rail of the modular system.

Follow Safety Precautions

1. If you have not done so already, troubleshoot the fault before replacing a PDU. Refer to the Service Manual for details.

2. Follow the safety and ESD precautions.

3. Arrange for an assistant to help you remove and carry the PDU to a workbench.

Caution – You must completely remove the PDU. You cannot service the PDU within the frame.

4. Prepare for servicing a PDU.

Safety Notices

Before installing a PDU into the modular system, observe the following safety and usage notices.
Caution – PDU installation and configuration must be done by qualified personnel with experience installing similar hardware.
Caution – Before installing and using the PDU, check it for any external damage. If the PDU is damaged, do not install or operate the PDU. Contact your service representative.
Caution – The PDU and any electrical equipment connected to it can be damaged by power load ratings above the values listed in “PDU Electrical Specifications” (listed in the service manual)
Caution – Do not use the PDU in damp conditions. If a liquid spills on the PDU, or if the PDU becomes damp from condensation, immediately disconnect the power input lead connector from the AC power supply. Contact your service representative before using the PDU again. You might need to return it for inspection.
Caution – Choose the maximum permitted fuse/circuit breaker load in the building according to the values listed in “PDU Electrical Specifications” (in the service manual) Observe all national and local regulations, safety provisions, and fuse load variations.
Caution – Never bend or rest any object on a PDU’s power input lead.
Caution – Ensure that the total power consumed by all of the connected equipment does not exceed the respective nominal power rating of the PDU.
Caution – Always provide an easily accessible safety disconnect for units with fixed connections.

5. Power off and disconnect adjacent components.

Power Off and Disconnect Components

1. Shut down and power off the adjacent components installed in the modular system.

2. Disconnect the PDU’s main power cords from the AC power. You do not need to turn off the non-faulty PDU’s circuit breakers.

3. Turn off circuit breakers to all PDU inputs.

4. Provide access to the components.

Provide Access to the PDU

If the modular system is installed in a location where enough physical access to the side panel and PDUs are not possible, for example, multiple systems side-by side, you must move the modular system that contains the faulty PDU.

1. Remove the front and rear doors of the modular system cabinet.

2. If access to the modular system requires moving it, perform the following:
a. Follow safety precautions.
b. Disconnect the I/O cables from the modular system.
c. Disconnect the power cords to the other PDU.
d. Using an M12 torque wrench, remove the bolts that hold the modular system to the floor, and save the bolts.
e. Remove the seismic brackets.
f. Unlock the caster rollers (if the rack has locking rollers).
g. Raise the levelers to make sure they do not drag or catch on the flooring.
h. Using two persons, carefully move the modular system to a nearby location that allows space for removing the side panel and performing the PDU replacement.

Caution – The side panel’s grounding strap is not visible until the side panel is partially removed. Be careful not to damage the grounding strap when removing the side panel.

3. Remove the side panel and disconnect the grounding strap corresponding to the PDU that is being replaced.

4. Remove the seismic side:
a. Remove any straps holding cables to the seismic side.
b. Disconnect the ground strap to the seismic side.
c. Using a T-30 Torx screwdriver, remove and set aside the 24 screws that connect the seismic side to the RETMA rail top hats.

Caution – Remove the top 4 screws last, and support the seismic side as you remove these last 4 screws.

d. Using a T-30 Torx screwdriver, remove and set aside the 30 screws that connect the seismic side to the frame.

5. Remove the four screws holding the coupler panel to its support brackets, then carefully pull the coupler panel out of the way.

Note – Do not disconnect any cables from the coupler panel.

If needed, see the “Remove the Coupler Panel” sections in the service manual supplement.

6. Remove the following:
a. Switch at slot 40 (or the blocking assembly if no switch is present.)
b. Remove slot 40 rear switch side rail on the replacement PDU side.
c. If the faulty PDU is 24kVA, remove the switch and rear switch-side rail at slot 39.

7. Remove the faulty PDU.

Remove the PDU

1. From the faulty PDU, carefully remove the two grounding cords, top and bottom, connecting the PDU to the modular system.

Caution – Do not touch the grounding cords to the other PDU when removing cords from the faulty PDU.

2. Note the forward/rear position of the bottom PDU bracket relative to the modular system, so that later you can install the replacement PDU in the same location.

3. Remove the two screws that hold the bottom PDU bracket to the modular system, and set the screws aside for use later.

The bottom PDU bracket remains attached to the PDU.

4. Note the forward/rear position of the top PDU brackets relative to the modular system interior, so that later you can install the replacement PDU in the same location.

5. From the top PDU bracket attached to the modular system:
a. Remove the two screws that hold the PDU to the top PDU bracket, and set the screws aside for use later.
b. Remove the two screws that hold the top PDU bracket to the modular system, and set the screws aside for use later.
c. Remove the PDU bracket from the modular system.

6. Disconnect the component power cords (FBS, FMM, switches), starting at the top and working to the bottom.

Caution – Never twist, kink, or tightly bend a power input lead.
Caution – Keep the bottom bracket resting on the frame while removing the power cords, to prevent strain on the power cords.

7. Remove the PDU and place it on a clean anti-static workbench.

8. Remove the bottom bracket from the faulty PDU.

9. If the replacement PDU came with brackets installed, remove and discard them.

Note – Only the mounting brackets from the modular system are compatible.

10. Attach the modular system bottom PDU bracket to the replacement PDU.

11. Install the replacement PDU.

Install the Replacement PDU

1. Flip all circuit breaker switches on the replacement PDU to the on position.

2. Feed the PDU input cords through the side and out the top of the frame.

3. Connect the power cords to their correct PDU sockets, as indicated on the power cord labels.

4. In the same position as originally installed, attach the top PDU bracket to the modular system. Earlier you noted the location.

Note – Make sure you place the bottom PDU bracket inside the modular system, and when adding the top PDU bracket, also have the PDU inside that top bracket.

5. Hang the PDU in the top bracket, then install the screws that attach the PDU to the top bracket.

Note – Only the top and bottom mounting brackets from the modular system are compatible. If the replacement PDU came with brackets attached, do not use them to install the PDU.

6. In the same position as originally installed, install the screws that attach the bottom PDU bracket to the modular system.

7. Reattach the grounding straps, top and bottom.

8. Connect and install adjacent components.

If needed, see “Connect and Install Adjacent Components” in the Service Manual Supplement.

Connect and Install Adjacent Components

1. Install the following:
Switch at slot 39 first, if removed for a 24kVA PDU.
Rear switch-side rail at slot 39, if removed.
Switch at slot 40
Rear switch-side rail on slot 40.

If needed, see “Servicing the Ethernet Switches” in the service manual supplement.

2. Install the coupler panel at level 41.

If needed, see the “Install the Coupler Panel” in the service manual supplement.

3. Install the seismic side:

Caution – Do not trap switch power cords between the seismic side and the RETMA rail-top hats.
Caution – Keep the seismic side and the modular system side panel’s grounding cords clear.

a. Supporting the seismic side, install the top 4 screws.

Caution – Before proceeding, verify the holes line up for the other 26 screws.

b. Install the 26 screws that connect the seismic side to the frame.
c. Install the 18 RETMA screws that connect the seismic side to the RETMA rail-top hats.
d. Connect the seismic side grounding cord.
e. Reconnect any ties or straps holding cables to the seismic side.

4. Install the side panel and connect the grounding cords.

5. If you moved the modular system to provide access to the PDU, return the modular system to its former location and secure it.

If needed, see “Return the Modular System to Previous Location” in the service manual supplement.

6. Connect any external I/O cables that were disconnected for the service.

7. Connect all PDU power input cords to their inputs.

8. Install the front and rear doors of the modular system cabinet.

9. Carefully check all the components and parts that you handled, to ensure that they are installed and connected correctly.

10. Turn on the circuit breakers.

If needed, see “Turn On or Off a PDU Breaker” in the service manual supplement.

Return the Modular System to Previous Location

1. If access to the modular system required moving it, perform the following:
a. Follow safety precautions.
b. Using two persons, carefully move the modular system to its previous location.
c, Lock the caster rollers (if the rack has locking rollers.)
d. Raise the levelers until the modular system is level.
e. Using an M12 torque wrench, reinstall the bolts that hold the modular system to the floor. If you need to replace a bolt, use an M12 concrete bolt such as an Hilte M12 HSL-3-B anchor, and follow the instructions that come with the bolt.

2. Continue from Step 3 to install the seismic side.

If needed, refer to these sections in the service manual supplement:

“Follow Safety Precautions”
“Identifying Component Locations and Slot Numbers”
“Install the Replacement PDU”
“Connect and Install Adjacent Components”
“Power On the System”

Power On the System

Power on the modular system.

Metering Unit Restriction
The metering units on the PDUs are not supported. Do not connect network cables to the PDU metering units.

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